Chick is originally an abbreviation of chicken. Since a time long forgotten it has been used in a metaphorical way referring to women, primarily due to their genetically caused affinity to an hyperactive flow of talk, as well as other strong likenesses:
-they are easy to excite
-usually turn up in masses and seldom are seen alone
-they get drunk easily
-their meaning of life is to eat and be eaten (out).

Mostly this last point has turned this word into a slogan of as much admiration a sensible man can give to a woman, i.e.

A positive slang term for pretty girls, usually young e.g. under 35.

girls you can only hook up with if your in a group of men looking for them

Girls with attitude

Cantonese: A prostitute
a person who fucks people or lets people fuck her for a certain amount of money

used instead of sweetie, hunny etc etc

The most beautiful girl that you know that you may or may not have a crush on...oh wait you're referring to the animal ?!?